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# Enthalpy Change of Combustion? (AS Chem) watch

1. Could somone please do show me how a question like this is done??

These are the measurements form my experiment:
Start: 23degreesC (water).
199.6g ethanol
30ml of water

End: 70degrees
199.06g of ethanol.

Could somone pleasee show me how to figure out the energy absorbed by the water?? (i reall have no idea) o:

Thanks!
2. (Original post by Peachesishere)
Could somone please do show me how a question like this is done??

These are the measurements form my experiment:
Start: 23degreesC (water).
199.6g ethanol
30ml of water

End: 70degrees
199.06g of ethanol.

Could somone pleasee show me how to figure out the energy absorbed by the water?? (i reall have no idea) o:

Thanks!
The energy absorbed by the water (ΔE) = mass(of water being heated) x specific heat capacity x temperature change

ΔE = mcΔT

To calculate per mole of ethanol divide the value of ΔE by the number of moles of ethanol burned
3. (Original post by charco)
The energy absorbed by the water (ΔE) = mass(of water being heated) x specific heat capacity x temperature change

ΔE = mcΔT

To calculate per mole of ethanol divide the value of ΔE by the number of moles of ethanol burned
Ohhh ok thankyouu
4. q=mct (change in t)

m=mass
c=heat capacity

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